How To Fix TN809 - Maintenance certificate check requires a kernel patch level >= 145

SAP Error Message - Details

• Message type: E = Error

• Message class: TN - Support Package Manager (SPAM) Messages

• Message number: 809

• Message text: Maintenance certificate check requires a kernel patch level >= 145

What causes this issue?

Check failed for a valid maintenance certificate for system &V2& because
the patch level of the kernel that was used is too low (current patch
level: &V1&).

How to fix this error?

Install a kernel with a least <ZH>patch level 145</>.
Background Information
As of 2009, maintenance certificates are required to be able to install
and maintain SAP software with the Add-On Installation Tool and Support
Package Manager. These maintenance certificates can be requested with
SAP Solution Manager and are distributed to the systems automatically.
For more information, see SAP Support Portal under
http://service.sap.com/maintenancecertificate and SAP Note 1240265.
Component SV-SMG-LIC is also available for reporting an problems or any
further questions.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TN809 - Maintenance certificate check requires a kernel patch level >= 145 ?

  The SAP error message "TN809 Maintenance certificate check requires a kernel patch level >= 145" indicates that the current kernel version of your SAP system is outdated and does not meet the minimum requirements for the maintenance certificate check. This check is essential for ensuring that the system is up to date with the latest patches and security updates.
  Cause:
  The error occurs because the kernel version installed on your SAP system is lower than the required version (145 or higher). This can happen if:
  
  The system has not been updated for a long time.
  The kernel patch level was not applied after an upgrade or installation.
  There are specific requirements for certain functionalities or compliance checks that necessitate a newer kernel version.
  
  Solution:
  To resolve this issue, you need to update the SAP kernel to the required patch level or higher. Here are the steps to do this:
  
  
  Check Current Kernel Version:
  
  You can check the current kernel version by executing the transaction code SLICENSE in the SAP GUI or by using the command disp+work in the command line.
  
  
  
  Download the Latest Kernel:
  
  Go to the SAP Support Portal (https://support.sap.com) and navigate to the Software Downloads section.
  Search for the latest kernel version compatible with your SAP system and download it.
  
  
  
  Update the Kernel:
  
  Follow the instructions provided in the SAP Note or the documentation for updating the kernel. This typically involves:
  
  Stopping the SAP system.
  Replacing the old kernel files with the new ones.
  Starting the SAP system again.
  
  
  
  
  
  Verify the Update:
  
  After updating, verify that the kernel version is now at least 145 or higher by checking it again using the methods mentioned above.
  
  
  
  Check for Additional Notes:
  
  It is advisable to check for any specific SAP Notes related to your version and the kernel update process. SAP Notes may provide additional instructions or considerations.
  
  
  
  Related Information:
  
  SAP Notes: Look for relevant SAP Notes that may provide additional context or specific instructions related to your version of SAP and the kernel update process.
  Kernel Patch Level: The kernel patch level is crucial for system stability, performance, and security. Regular updates are recommended.
  Maintenance Certificates: These are used to validate the system's compliance with SAP's maintenance policies and ensure that the system is eligible for support and updates.
  
  By following these steps, you should be able to resolve the TN809 error and ensure that your SAP system is running on a supported kernel version.